P1303
Cylinder Number 3 Random Misfire Detected
P1303 is an OBD-II diagnostic trouble code meaning: Cylinder Number 3 Random Misfire Detected. Common causes: spark plug fault in cylinder 3, problems with the ignition coil. Estimated repair cost: $6–56.
Symptoms
- The engine hesitates or runs rough
- Reduced engine power
- Increased fuel consumption
- Check Engine light is on
- Engine vibrations at idle
Causes
- Spark plug fault in cylinder 3
- Problems with the ignition coil
- Clogged or faulty fuel injector
- Low cylinder compression
- Problems with the ignition system wiring harness
How to Fix
- Check and replace spark plug in cylinder 3
- Check the functionality of the ignition coil
- Check and replace fuel injector if necessary
- Measure the compression in the cylinder
- Check the condition of the ignition system wiring harness
Related codes
Error P1303 by Vehicle Brand
FAQ
What does the P1303 code mean?
P1303 is an OBD-II diagnostic trouble code that indicates: Cylinder Number 3 Random Misfire Detected
What causes a P1303 error code?
The most common causes of P1303 include: Spark plug fault in cylinder 3; Problems with the ignition coil; Clogged or faulty fuel injector; Low cylinder compression.
How do I fix a P1303 diagnostic trouble code?
To fix P1303: Check and replace spark plug in cylinder 3. Check the functionality of the ignition coil. Check and replace fuel injector if necessary. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1303?
Limited driving only, diagnose soon
How much does it cost to fix P1303?
The estimated repair cost for P1303 is $6–56. Actual cost depends on your vehicle, location, and labor rates.
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